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PolyGeo ♦
PolyGeo ♦
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I am coding a python plugin to QGIS that connects to the UK National Biodiversity Network (NBN) Web Mapping Service (WMS). In general, I don't have any problems doing this with the QgsRasterLayer API when I want to access the WMS as a public user. The problem is when I want to access the WMS as a registered user (to get access to secured data).

The NBN WMS provides a method for doing this by supplying a username and an MD5 hashed password as additional parameters to the web service called username and userkey respectively (https://data.nbn.org.uk/Documentation/Web_Services/Web_Map_Services/).

The parameters work as advertised when requests are tested in a browser. However, they have no effect when used through QGIS and when I used Fiddler to examine the HTTP requests that QGIS is actually sending to the NBN WMS, I find that the username and userkey parameters are no sent by QGIS.

They are non-standard parameters, but the OGC standard says that non-standard parameters are allowed (and don't break the standard). Does anyone know why QGIS strips these non-standard parameters out of the HTTP request or how I can get around it?

Rich Burkmar

I am coding a python plugin to QGIS that connects to the UK National Biodiversity Network (NBN) Web Mapping Service (WMS). In general, I don't have any problems doing this with the QgsRasterLayer API when I want to access the WMS as a public user. The problem is when I want to access the WMS as a registered user (to get access to secured data).

The NBN WMS provides a method for doing this by supplying a username and an MD5 hashed password as additional parameters to the web service called username and userkey respectively (https://data.nbn.org.uk/Documentation/Web_Services/Web_Map_Services/).

The parameters work as advertised when requests are tested in a browser. However, they have no effect when used through QGIS and when I used Fiddler to examine the HTTP requests that QGIS is actually sending to the NBN WMS, I find that the username and userkey parameters are no sent by QGIS.

They are non-standard parameters, but the OGC standard says that non-standard parameters are allowed (and don't break the standard). Does anyone know why QGIS strips these non-standard parameters out of the HTTP request or how I can get around it?

Rich Burkmar

I am coding a python plugin to QGIS that connects to the UK National Biodiversity Network (NBN) Web Mapping Service (WMS). In general, I don't have any problems doing this with the QgsRasterLayer API when I want to access the WMS as a public user. The problem is when I want to access the WMS as a registered user (to get access to secured data).

The NBN WMS provides a method for doing this by supplying a username and an MD5 hashed password as additional parameters to the web service called username and userkey respectively (https://data.nbn.org.uk/Documentation/Web_Services/Web_Map_Services/).

The parameters work as advertised when requests are tested in a browser. However, they have no effect when used through QGIS and when I used Fiddler to examine the HTTP requests that QGIS is actually sending to the NBN WMS, I find that the username and userkey parameters are no sent by QGIS.

They are non-standard parameters, but the OGC standard says that non-standard parameters are allowed (and don't break the standard). Does anyone know why QGIS strips these non-standard parameters out of the HTTP request or how I can get around it?

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Rich Burkmar
Rich Burkmar
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Non-standard WMS parameters not sent in GetMap requests via QGIS?

I am coding a python plugin to QGIS that connects to the UK National Biodiversity Network (NBN) Web Mapping Service (WMS). In general, I don't have any problems doing this with the QgsRasterLayer API when I want to access the WMS as a public user. The problem is when I want to access the WMS as a registered user (to get access to secured data).

The NBN WMS provides a method for doing this by supplying a username and an MD5 hashed password as additional parameters to the web service called username and userkey respectively (https://data.nbn.org.uk/Documentation/Web_Services/Web_Map_Services/).

The parameters work as advertised when requests are tested in a browser. However, they have no effect when used through QGIS and when I used Fiddler to examine the HTTP requests that QGIS is actually sending to the NBN WMS, I find that the username and userkey parameters are no sent by QGIS.

They are non-standard parameters, but the OGC standard says that non-standard parameters are allowed (and don't break the standard). Does anyone know why QGIS strips these non-standard parameters out of the HTTP request or how I can get around it?

Rich Burkmar